Redwood Road & 35th Avenue Traffic Study

Problems Observed:

• High collision rate along the corridor was found at McArthur Boulevard intersection, with 0.55 collisions per million vehicles entering the intersection (MV). This rate exceeds the California State average of 0.43 collisions per MV.

• The highest collision factor is unsafe speed.• Vehicles turning left from westbound Redwood Road onto

southbound Mountain Boulevard (East) exceed the storage capacity of the left-turn lane during the AM peak period.

• A scarcity of gaps in traffic on Redwood Road make it difficult for motorists to turn left from Mountain Boulevard (West) onto eastbound Redwood Road.

• The horizontal and vertical roadway curvature on 35th Avenue/Redwood Road limits the sight distance for motorists at Jordan Road and other unsignalized cross streets.

Potential Remediation Measures:

• Implement a road diet to convert the existing 4-lane facility to 3-lane facility (one lane in each direction with left turn lanes approaching intersections, from east of MacArthur Boulevard to west of Monterey Boulevard.

• Consider providing a bike lane at least along eastbound 35th Avenue and Redwood Road from east of MacArthur Boulevard to west of Monterey Boulevard through the uphill section of the corridor. If a road diet is implemented, consider installing bike lanes in both directions.

• Install curb extensions at pedestrian crosswalks to shorten the street crossing distance.

• Relocate some bus stops and crosswalks.• Modify the Mountain Boulevard West intersection to prohibit southbound left-

turning movements from Mountain Boulevard West, narrow the width of Mountain Boulevard, and install a pedestrian crosswalk.

• Improve signage for the Highway 13 on-ramp near Lincoln Square Shopping Center

• Prohibit left-turning movements out of the east driveway of the Lincoln Square Shopping

• Center.• Signalize the Lincoln Square Shopping Center west driveway to address the many

broadside collisions in the vicinity.• Install a sidewalk between the two Lincoln Square Driveways

Machine Counts

Bi-directional 24 hour weekday traffic data were collected on Wednesday September 22, 2010.There were a total of 6 count locations selected along the study corridor at the following locations:

• 35th Avenue East of MacArthur Boulevard• 35th Avenue West of Wisconsin Street• Redwood Road East of Jordan Road• Redwood Road West of Aliso Avenue• Redwood Road East of Mountain Boulevard West• Redwood Road West of Lincoln Square East Driveway.

Intersection Turn Movement Counts

Intersections counts were performed on Tuesday September 21, 2010 at 9 locations along the 35th Avenue/Redwood Road corridor. Turn movement volumes for the AM peak period were collected between 7-9AM, while the PM counts were collected from 4-6PM. The locations ofthe 9 intersection turn movement counts were:

• MacArthur Boulevard & 35th Avenue• Wisconsin Street & 35th Avenue• Monterey Boulevard & Redwood Road• Aliso Avenue/SR 13 SB Off-Ramp & Redwood Road• Mountain Boulevard West• Lincoln Square West Driveway• SR 13 NB On-Ramp• Mountain Boulevard East• Lincoln Square East Driveway

Data Collection Locations

Existing Roadway Features

Map View of Collision Locations

Potential Remediation Measures:

One or more of the following measures are suggested for consideration:

• Implement a road diet to convert the existing 4-lane facility to 3-lane facility (one lane in each direction with left turn lanes approaching intersections, from east of MacArthur Boulevard to west of Monterey Boulevard.

• Consider providing a bike lane at least along eastbound 35th Avenue and Redwood Road from east of MacArthur Boulevard to west of Monterey Boulevard through the uphill section of the corridor.

• Install curb extensions or other traffic calming devices.• Relocate some bus stops and crosswalks.• Prohibit southbound left-turning movements from Mountain Boulevard West• Improve signage for the Highway 13 on-ramp near Lincoln Square Shopping

Center• Prohibit left-turning movements out of the east driveway of the Lincoln

Square Shopping Center.• Signalize the Lincoln Square Shopping Center west driveway to address the

many broadside collisions in the vicinity.• Install a sidewalk between the two Lincoln Square Driveways

Proposed Remediation at Mountain & Mountain

Proposed Remediation at Lincoln Square Driveway West and Redwood Road

Proposed Remediation at Lincoln Square Driveway East and Redwood Road

Any Questions?

Contact Information

• District 4 Councilmember Libby Schaaf’s Office:

– Bruce Stoffmacher – 510 238 7041– bstoffmacher@oaklandnet.com